My son did a "restore default options" (for reasons unknown). Now whenever i play "learn a song", it misses all the notes that i am playing correctly. I never had a problem prior to this. If anyone can help me out, it would be greatly appreciated.

@@indyaero109, um, It seems like ubi could help too if no one able to help here, but

Can you re-setup game again? I think It learn some things about instrument during play time and it's going well with time.
go set Real-Tone cable gain then re-calibrate again in tuner before a song and play about 3 songs, then reboot the game and let us know if it detects better.

but. make sure you've got your guitar setup is fine. Intonation, attack and tuning is fine. RS like when your intonation is perfect, but mine is like 15 cents off and it's still playable